Anodization of large area Ti: a versatile material for caffeine photodegradation and hydrogen production

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F22%3A10250612" target="_blank" >RIV/61989100:27710/22:10250612 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2022/CY/D2CY00593J" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2022/CY/D2CY00593J</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d2cy00593j" target="_blank" >10.1039/d2cy00593j</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Anodization of large area Ti: a versatile material for caffeine photodegradation and hydrogen production

Popis výsledku v původním jazyce

Facile, single-step, and scalable fabrication of large-area (i.e., similar to 20 cm(2)) TiO2 nanostructures (TNS) with excellent photocatalytic activity under UVA light was carried out via electrochemical anodization. Anodization in a glycerol-based electrolyte containing fluoride ions was conducted at applied potentials of 20-80 V (20 V per step) for 100 min. Anodization at 20 V (TNS-20) and 40 V (TNS-40) led to formation of nanotubular TiO2, whereas, at 60 V (TNS-60) and 80 V (TNS-80) porous TiO2 was obtained. The highest caffeine photodegradation rate was obtained using TNS-20 (rate constant; k = 0.0069 min(-1)) and TNS-60 (rate constant; k = 0.0067 min(-1)). Moreover, hydrogen production by decomposition of methanol on large-area anodized Ti is reported here for the first time. The highest hydrogen production rate was observed using TNS-20 (production rate of similar to 6200 ppm, i.e., 25.83 ppm min(-1)), followed by TNS-60 (production rate of similar to 5900 ppm, i.e., 24.58 ppm min(-1)). The efficiency of these two materials is due to the interplay of the structure, morphology, and HO radical generation that favor TNS-20 and TNS-60 for both photocatalysis and hydrogen production. This work shows a potential strategy to synthesize large-area anodic TNS efficient for photocatalysis and hydrogen production. Synthesis of large-area materials is crucial for most real (photo)electrochemical applications where TNS of several cm(2) in macroscopic surface area are necessary.

Název v anglickém jazyce

Anodization of large area Ti: a versatile material for caffeine photodegradation and hydrogen production

Popis výsledku anglicky

Facile, single-step, and scalable fabrication of large-area (i.e., similar to 20 cm(2)) TiO2 nanostructures (TNS) with excellent photocatalytic activity under UVA light was carried out via electrochemical anodization. Anodization in a glycerol-based electrolyte containing fluoride ions was conducted at applied potentials of 20-80 V (20 V per step) for 100 min. Anodization at 20 V (TNS-20) and 40 V (TNS-40) led to formation of nanotubular TiO2, whereas, at 60 V (TNS-60) and 80 V (TNS-80) porous TiO2 was obtained. The highest caffeine photodegradation rate was obtained using TNS-20 (rate constant; k = 0.0069 min(-1)) and TNS-60 (rate constant; k = 0.0067 min(-1)). Moreover, hydrogen production by decomposition of methanol on large-area anodized Ti is reported here for the first time. The highest hydrogen production rate was observed using TNS-20 (production rate of similar to 6200 ppm, i.e., 25.83 ppm min(-1)), followed by TNS-60 (production rate of similar to 5900 ppm, i.e., 24.58 ppm min(-1)). The efficiency of these two materials is due to the interplay of the structure, morphology, and HO radical generation that favor TNS-20 and TNS-60 for both photocatalysis and hydrogen production. This work shows a potential strategy to synthesize large-area anodic TNS efficient for photocatalysis and hydrogen production. Synthesis of large-area materials is crucial for most real (photo)electrochemical applications where TNS of several cm(2) in macroscopic surface area are necessary.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

<a href="/cs/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institut environmentálních technologií - excelentní výzkum</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Catalysis Science and Technology

ISSN

2044-4753

e-ISSN

2044-4761

Svazek periodika

12

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

nestrankovano

Kód UT WoS článku

000824867000001

EID výsledku v databázi Scopus

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